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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2014

Subgap structure in the conductance of a three-terminal Josephson junction

Résumé

Three-terminal superconductor (S)-normalmetal (N)-superconductor (S) Josephson junctions are investigated. In a geometry where a T-shape normal metal is connected to three superconducting reservoirs, new subgap structures appear in the differential resistance for specific combinations of the superconductor chemical potentials. Those correspond to a correlated motion of Cooper pairs within the device that persist well above the Thouless energy and is consistent with the prediction of quartets formed by two entangled Cooper pairs. A simplified nonequilibrium Keldysh-Green's function calculation is presented that supports this interpretation.
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Dates et versions

cea-01054613 , version 1 (07-08-2014)

Identifiants

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Andreas H. Pfeffer, Jean Eudes Duvauchelle, Hervé Courtois, Régis Mélin, Denis Feinberg, et al.. Subgap structure in the conductance of a three-terminal Josephson junction. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 90 (7), pp.075401. ⟨10.1103/PhysRevB.90.075401⟩. ⟨cea-01054613⟩
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